<!DOCTYPE html>
<style>
    body {
        -webkit-writing-mode: vertical-lr;
    }
    .multicol {
        height: 470px;
        float: left;
        padding: 10 0px;
        border: 5px solid black;
        line-height: 20px;
    }
    .column {
        float: left;
        height: 150px;
    }
    .rule {
        float: left;
        height: 4px;
        width: 200px;
        background-color: maroon;
        margin: 3px 0;
    }
</style>
<div class="multicol">
    <div class="column">
        Line 1<br>
        Line 2<br>
        Line 3<br>
        Line 4<br>
        Line 5<br>
        Line 6<br>
        Line 7<br>
        Line 8<br>
        Line 9<br>
        Line 10<br>
    </div>
    <div class="rule"></div>
    <div class="column">
        Line 11<br>
        Line 12<br>
        Line 13<br>
        Line 14<br>
        Line 15<br>
        Line 16<br>
        Line 17<br>
        Line 18<br>
        Line 19<br>
        Line 20<br>
    </div>
    <div class="rule"></div>
    <div class="column">
        Line 21<br>
        Line 22<br>
        Line 23<br>
        Line 24<br>
        Line 25<br>
        Line 26<br>
        Line 27<br>
        Line 28<br>
        Line 29<br>
        Line 30<br>
    </div>
</div>
